I can't decide if this is a good stone for the price. The following are its attributes:.905 crt.; SI1; H color; AGS Ideal 0 (also ideal polish and symmetry); inert fluorescence; table=54%; depth=62.1%; 6.19mm-6.25mm * 3.86mm; crown=15.7% (34.8deg); pavilion=43.6% (41.3deg); thin girdle; no cutlet. Price is $4,308.Any insight as to these measurements and whether the cost is consistent would be most appreciated. Thanks.